Annealing-box.



PATENTED DEC. 12, 1905..

' M. JOHNSON.

ANNEALING BOX.

APPLICATION FILED JUNE 22.1905.

INVENTOR ATTORN EY MALOOM JOHNSON, OF ALLEGHENY, PENNSYLVANIA.

ANNEALlNG-BOX.

Specification of Letters Patent.

Patented Dec. 12, 1905'.

Application filed June 22, 1905. Serial No. 266,474.

To all whom it may concern.-

Be it known that I, MALGOM JOHNSON, a citizen of the UnitedStates,residing at Allegheny, in the county of Allegheny and State ofPenn sylvania, have invented new and useful Improvements inAnnealing-Boxes, of which the following is a specification.

The object of my invention is to provide a new and improvedannealing-box; and to this end the present invention particularlyrelates to a new and improved wrought-iron annealing-box; and itconsists of an annealing-box in the construction and in the combinationof parts, all as fully hereinafter described and claimed.

In the accompanying drawings, which illustrate an application of myinvention, Figure l is a perspective view of a box constructed inaccordance with myinvention; Fig. 2, a vertical sectional view; Fig. 3,a part-plan and a part-sectional view, and Fig. 4 an enlarged detailview.

Referring to the drawings, the body of the annealing-box is preferablyformed from a single piece of wrought metal and comprises two sideportions 2 2 and two end portions 3 3. One of the side portions 3 isformed with an overlapping part 4, which part is designed to extend overone of the end portions 3 and to be welded thereto. This construction,it will be noted, calls for a simple and efficient body portion capableof resisting warping or bending when subjected to intense heat. The boxis open at the bottom and closed at its top by a cap or cover 5. Cover 5preferably consists of a single piece of metal formed with a dependingflange 6. This cap or cover, as illustrated, has a slightly convex outersurface; but it is sometimes made with a flat surface. The dependingflange 6 when the cover is fitted to the body overlaps the upper edgesof said body. This flange is welded to the sides and ends of the bodyportion.

A characteristic and important feature of the present invention is thestrip or, as shown, the strips 7 7. These strips extend entirely aroundthe box at its upper end and, as clearly shown by the drawings, projecta slight distance above the upper edges of the box and the flange of thecover. These strips 7 7 in addition to greatly strengthening the boxprovide a space for sand or other material. The strips are fastened tothe body of the box by bolts 8 8 and are disposed over the dependingflange of the cover. The bolts 8 8 are screw-threaded, as shown by thedrawings, and are adapted to engage with screw-threads formed in holesin the body of the box, through which the bolts enter when theprotecting and strengthening strips 7 7 are applied.

In the manufacture of annealing-boxes of the class to which my inventionrelatesthat is to say, in which the top or cover is welded to the bodyportionit is well known that the heating and hammering necessary toaccomplish the welding as well as the refining due to the heatnecessaryin the welding process reduce the thickness of the box, andthus weaken it along the line of weld and near the upper edges of thebox. In the use of these boxes the intense heat to which they are subbyburning through or by the effect of the unequal expansion andcontraction at the reduced portion along the line of weld, therebypermitting air to enter the box, rendering the same worthless. Theprimary object of the present invention is to protect this portion ofthe box and to lengthen the life ofthe same. .This I accomplish by meansof the strips 7 7, secured to the box over the flange of the coverbyscrew-bolts 8 8. In time, of course, the protecting-strips aredestroyed. When these strips are rendered useless, they are knocked offthe box. In this connection I desire to particularly call attention tothe fact that the protecting strip or strips are attached to the box byscrew-bolts and not by rivets or other means. With the employment ofbolts which screw into the body of the box the protecting strip orstrips and the outer portion of the screw-bolts may be broken away fromthe body portion, leaving a part of each bolt in the body and theannealingbox in as good a condition at the upper part thereof as anannealing-box not having my protecting-strip applied thereto in thefirst instance. Rivets could not be employed for securing theprotecting-strip to the body, because they would fall out of the holesin the body upon the removal of the strip or strips.

What I claim is f 1. An annealing-box having a body portion, and a topportion welded to the body portion and means for protecting the reducedwelded portion of the box, consisting of a separate strip of metaldisposed over said weld portion and secured to the body by securingmeans IIO which have a tight fit in the body portionand are adapted toform permanent closing-plugs in the body portion after the removal ofthe said strip, substantially as described.

' 2. An annealing-box having a body portion, and a top portion welded tothe body portion and means for protecting the reduced welded portion ofthe box, consisting of a separate strip of metal disposed over said-weldportion and secured to the body by securing means which have a tight fitin the body portion and are adapted to form permanent closing-plugs inthe body portion after the removal of the said strip, said securingmeans projecting loosely through said strip, substantially as described.

3. An annealing-box having the body portion formed of a single piece ofwrought metal with the ends of the piece welded together at one cornerof the body, a cover for the body formed with a depending flange andwelded to the body, protecting-strips extending around the upper end ofthe body and disposed over the'welded portion and flange of the cover,said strips projecting above the body and the flange of the cover, and aseries of screw-threaded bolts for fastening the strips to the body,said bolts passing freely through the strip, and having their threadedportions engaging the body, substantially as described. lt. Anannealing-box havingits body formed of a single piece of metal, a coverfor the body welded thereto, a protecting-strip of metal extendingaround the upper end of the body and over the welded portion, andscrewthreaded bolts, passing through the strip and having their threadedportions engaging the body, substantially as described.

5. An annealing-box consisting of a welded body portion, a top welded tothe body portion, and means for protecting the weld-line of the top andbody consisting of astrip of metal disposed over the weld-line andsecured to the body by screw-threaded bolts having their threadedportions engaging the body, whereby they are adapted to form tight,closingplugs in the body when the strip is broken away orremoved,'substantially as described.

In testimony whereof I aflix'my signature in presence of two subscribingwitnesses.

MALCOM JOHNSON.

Witnesses:

MARGARET HUGHES, W. G. DOOLITTLE.

